wachenberg



L. WACHENBERG..

FILTER.

APPLICATION FILED APR.5. 1919.

Patented Apr.1 3, 1920.

4 SHEETS-SHEET I.

/vvnvmn 5y ATTORNEYS Patented Apr. 13,1920

4 SHEETS-SHEET 2.

L. WACHENBERG.

FILTER.

APPLICATION FILED APR-5, 1919.

L. WAGHENBERG.

FILTER. KPPLICAHON FILED APR-5, 1919.

Patented Apr. 13, 1920.

WI T/VESSES L. 'WACHENBERG.

FILTER, APPLICATION FlLED\- APR. 5, 1919.

Patented Apr. 13 192% 4 SHEETS-SHEET 4.

LEWIS WACHENBERG, OF NEW YORK, N. Y.

FILTER.

Specification of Letters Patent.

Patented Apr. 13, 1920.

Application filed April 5, 1919. Serial No. 287,66a.

To alt w/lom "it may concern lie it known that 1, Lewis l VlionnNnnnG, acitizen of the United States, and a resident of the rity of New York,borough of the Bronx, in the county of Bronx and State of New York, haveinvented a new and 1mproved Filter, oi which the following is a full,clear, and exact description.

This invention relates to filters such for example as those that arecommonly used for commercial purposes in the inan'uliactiu'e or refiningof sugar or other analogous commodities or processes.

Among the objects of this invention is to provide a construction of acompact nature but having large capacity for the output thcrethrough,but which being relatively small in size and being equipped with specialmeans for manipulation provides for he cleansing, renewal or interchangeof the hereby providing ample room to accommolate a ronsiderably largernumber of filters or iilter press units in a given space than hasheretofore been possible.

Another object of the invention is to improve the construction of filterplates or frames with. respect to the manner and con 'venience oiapplying thereto the filtering cloths.

Another object oi? the invention is to improve the facilities forcleansing the filter press and especially the removal of scum, mud orsludge from the filter plates thereby renovating the filtering clothsand making them practically equal to new cloths so as to maintain thesame construction in usable condition for long periods of time.

More specifically stated the improvement comprises a casing or drum ofany suitable size, design or capacity into and through. which the liquorto be filtered is caused to pass and having arranged within it aplurality of filter plates so made and connected J, b liltcring elementswith convenience, and i.

that the filtrate may pass through the same with the maximum facilityand volume, and means being provided to apply a cleansing medium throughthe filtering plates in a reverse direction to that of the movement ofthe filtrate so as to remove the deposits from the outside 01. theplates in the most logical manner or direction of action.

With the foregoing and other objects in view the invention consists inthe arrangement and combination of parts hereinafter described andclaimed, and while the invention is not restrictedto the exact detailsoi construction disclosed or suggested herein, still for the purpose ofillustrating a prac tical embodiment thereof reference is had to theaccompanying drawings, in which like reference characters designate thesame parts in the several views, and in which- IOHIG 1 is a sideelevation of the preferred embodiment oi my invention arranged ior iitering operation, and indicating thereover the relation of the overheadpower means for the lifting of the cover from the drum.

Fig. 2 is an end view of the same looking toward the right in Fig. 1,but with the power means shown as attached.

Fig. is an enlarged sectional detail of the filter plates on the line3-3 of Fig. 4.

Fig. l: is a side elevation of the same detail.

Fig. is a vertical transverse section on the line 5-5 of Fig 1.

Fig. 6 is an enlarged transverse sectional detail on the line 6-6 ofFig. 8.

Fig. 7 is a fragmentary vertical longitudinal section of the apparatus;and

Fig. 8 is an enlarged vertical longitudinal sectional detail on the line8-8 of Fig. 6.

Referring now more specifically to the drawings I show a main casing ordrum 10 having a main body portion with coaxial trunnions l1 and 12journaled for rotation in any suitable stationary standards or bearings13 and 14. respectively and having a removable but normally hermeticallysealed cover 15, the same being shown as provided with hanger lugs orbrackets 16 having holes 17 for the application of the overhead hoistingmeans 18. The lugs 18 carried by the cover mate with lugs 19 fixed tothe main portion of the drum and carrying pi voted hanger bolts 20 forclamping the cover in place.

While the drum may have any desired size or form it is shown as beingcylindrical with the ends or heads thereof of suitable strength for thepurposes of the invention, but with the space between the heads free forthe insertion and manipulation oi? the filter plates 21, the same beingshown in this instance as being circular or disk like and arranged inspaced parallel vertical trans verse planes from one end or head ofthedrum to the other. The plates 21 are held.

cap nut 27 serving two functions, to seal the otherwise open end of thenozzle and to lock the same rigidly in place.

With reference now to Figs. 3, land 5 each filter plate 21 is preferablymade up as follows: 28 is a flat reticulated body made of Wire gauze, orits equivalent, of a strong and'durable nature and of proper form toestablish the size and form of filter plate that may be found mostsuitable for any filter press. On the opposite faces or sides of thecore 28 are sheets 29 of suitable fabric or filter cloth of the samegeneral form as the body or core but preferably of larger diameter sothat an appreciable amount of fabric edges would be projected beyond thebody. On the opposite sides of the edge portions of the filter plate aretwo frames 50 shown as of angle structure with their outer flangesprojected laterally from each other at 30. A strong hoop 31 is thenslipped over the flanges 30, the projecting edge portions 29' of thefilter cloths projecting laterally in opposite directions betwccn'thehoop'3l and said frame flanges 30. Fluid cloth edges are then broughttogether and folded into a compact mass on the outside of the hoop 31and then a flexible band 32 is applied therearounda Pairs of clampinemhers 33 and in suitable numbers are then applied over these framesand bands and which after being tightened together by any suitable meanssuchas binding screws 35 acting through theniembers 33 into the members3%- the attachment of the filter cloths may be made secure under propertension and without any possibility of leakage of the liquor to befiltered. ,T he above mentioned delivery nozzle 23 is secured firmlyinto a coupling 36 having a port 36' in direct communication withtheperipheral passageway 87 surrounding the periphery of the core 28. Intheregion of the coupling 36 the'edges 29 of the filter cloths arewrapped or otherwise secured around the coupling as shown at 38. Afterthe clamps 33 and3-lare put in place as described and drawn-firmlytoward each other, a series of cams 39 journaled on the respective clampbolts 35 are turned so as to put the flexible band 32 under considerableradial compression and making secure the sealing of the joint along theedges of the cloths entirely around each of the filter plates. The framemembers 30 and the parts associated therewith constitute in theirassembled position rigid strong frames or binders for the filter plates.

The trunnions 11 and 12 are both preiliirably tubular or hollow andprojecting inward through the hollow trunnion ll is an inlet nozzle l-Uhaving a stulling box connection ll with a. stationary arm bearing 42and having a smiling box l3 within the admission head of the drum. Thenozzle ell) is thus held stationary while the drum may at times rotatetherearound. The inlet nozzle is smaller in diameter than the bore oithe trunnionj 11 whereby there is observed a cylindrical channel -l-lleading from a chamber $5 in the bearing el-2 to a pipe 1L6 extendingradially along the drum head to a delivery manifold l'i parallel to andon substantially the same plane as the outlet bar 25 above described.The remote end o'l'l'hc manifold .17 is provided with a discharge pipel8 access to which is controlled by a valve 49.

For each outlet chamber :26 of the outlet bar I provide a transfermember in the nature of a. pipe fit) communicating at one end with thechamber 26 and at its other end with the delivery manifold 4-7. Thepipe- O is fitted lu-lwcen its ends with two important features namely ashut-oil valve it and a sight glass 52. Communicating with another partof each of the outlet chambers ii) is a pipe 53 having at its outer end:1 normally closed test cock 5.4-.

553 indicates a main admission pipe for the liquid to be filtered, thesame con'ununieating with the inlet nozzle l0 and controlled by a valve56. A. branch pipc 5T communicates with the main pipe 3 through a union58 below the valve to. .\nother pipe 59 having a normnll closed valve 60communicates with the chamber lleading toward the channel -l-l. Aconnecting pipe 61 having a normally closed valve 62 leads between thepipes 55 and an.

The hollow trunnion 12 at the remote cud of the drum from the inletdevices accord modates a pipe (i -3 arranged coaxial of tho filter drumwhile thespace surrounding the pipe is fitted with a packing gland (ll-ITo the inner end of the pipe (iii are connected a series of radiallydisposed arms or pipes 65 each terminating in a spraying nozzle (in justwithin the wall of the drum. in Fig. 5 I show six of these nozzles (illarranglrd between the peripheries of the filter plates and thecylimlrical wall of the drmn.

Fixed in any suitable manner to the lEllll' nion 12 inst beyond thebearing; support ll .is a worm gear 67 meshing with a worm us:

connected to a driving'shaft (39 journalod in bearings 70. .a clutch 71controls tho operation of the driving sl aft (in from anv suitablesource of power from which it is understood also that any other suitabledriving means than the worm gearing migl'it be employed, but the wormgearing is preferred because of the fact that it constitutes automaticlocking means holding the drum from rotation during the normal filteringoperation. Additional locking means, how ever, comprising a bolt T2 witha handle T3 at its outer end may be employed as a posi tive lo: x incooperation with any suitably arranged notches T5 in one end 01 thedrum.

ll ith the apparatus constructed and adjusted as shown in the drawingsand with the drum etatiomrry liquid to be filtered is admitted. throughthe pipe and nozzle -il0 under suitable pressure filling the interiorot' the drum. irny suitable air vent "it may be provided to :lfacilitatethis initial filling. The liquid to be filtered naturally comes intodirect contact with both sides of all of the filter plates the pressureof which against the cloths is borne by the metal gauze 28. The pressurebeing normally the same on both sides of the filter plates there is notendei'icy for the pressure to warp, break or dama e any part of themechanism. Tl'lG filtrate passing through the cloths 2?) finds its wayalong the wire mesh or the like oi the members 28 thence along thepassageways 37 through the nozzles 23 and out through any suitablearranged ports '77 into the outlet chambers 26 thence out through thescvera transfer mei'nbers into the delivr y manifold at? and pipe 48leading to any suitable receiver for the filtii'ate. This operation mayhe continued until the filter plates become tool or occluded by anyaccumulation of sediment, mud or the like solids or impurities, theretention of which is the primary function oi t is .u'iachine. Theoprator by inspccthiin oil the operation at the sight glasse ay ob ie atany time the operation oi the several filter plates, determining at aglance whether the filtrate is running clear or pure. It he wishes totake a sample of the filtrate for chemical or other analysis he may doso at any time through a cool; 54. ll. any one or more of the filterplates should operate imperfectly or are delivering cloudy liquid or forother reason such action may be desirable the action thereof may be cutoff at any time by closinthe valves 51, an expedient of considerablecontained within the drum may be delivered or drained therefrom througha pipe 78 having a normally closed valve it), the same be- .ing returnedto the original. vat or otherwise for subsequent treatment. he valve 56being closed hot we a or other cleansing medium will be admitted throughthe pipes 57 and 55, and nozzle ill partially filling the drum. fairunder pressure or other suitable cleansing liuid such as water or steammay then he admitted through the pipe 59, channel ell, pipe 1 deliverymanifold and in a reverse direction through the intnvidual transiermembers 50 through the several filter plates, the action of which servesto dislodge the accumulations of mud, sed ment or the like from thefilter cloth 29 ll ith the disconnection of the pipe connections at thebottom of the drum and the unlocking of the positive bolt '72 the drummay be caused to rotate at a suitable ate of speed through the drivinggear 6? and (58 in order to provide a suitable agitation oi? thecleansing nediums within the drum. During this operation steam I admitthrough the pipe arms and perforated nozzles 66 with the dual etlect oi?sporting steam in the upper portion of the drum directly against thefilter plates not covered with water, and secondly the turbulent z 1tation oi the water through which. the is admitted at the bottom. Theadini =7 steam turtherin serres to lie p the wash. vater hot within thedrum. At any time the aceunnilarion of inuds, sludge or other solidparticles washed from the filter plates may be discharged through a dain pipe 80. The rotation or the drum during the washing operation oithe hi s" plates is of prime importance in the e'fiectin ot the iredobject. After a tow minir of ro on or churning efiect during thecleansing process the cleansing operation is completed and is uniformthroughout all of the filter plates leaving them again fresh and cleanand in practically the same condition as when first introduced. A handwheel 81, or its equiva lent, is provided in connection with the driveshaft 69 for the manipulation of the drum while positioning it for themost convenient admission or withdrawal of the filter plates or likepurposes. Ordinarily the cover 15 will be upright shown in Fig. 2 forthe removal thereof by the overhead hoisting gear 18, but after thecover is removed it is desirable that the drum be retated so as to tiltit for the most convenient access This naturally may easily be effectedby manipulation of the hand wheel 81 while the clutch 71 is released.

I claim:

1. In a filter, the combination of a drum rotatably mounted at each endon a hollow trunnion. means to deliver into the drum through a hollowtrunnion a liquid to be lll) filtered, means to deliver the filtratefrom the drum, filtering means within the drum through which thefiltrate is caused to pass leaving acciunulations of solid matter, meansto deliver a cleansing fluid through said hol low trunnion independentof the liquid to be filtered in a reverse direction through thefiltering means, means to deliver a cleansing liuid against the outerside of the filtering means simultaneously with the forcing of thecleansing fluid in the reverse direction, and means, to rotate the drumduring the cleansing thereof.

2'. In a filter, a drum, snipportinomeans for the drum including hollowtrunnions, filtering means within the drum, means to admit through oneof said trunnions a liquid to he filtered, means to aomit a cleansingmedium through said trunnion so as to pass through said filtering meansin a direction opposite to the direction oi"? said liquid, means toadmit through the other of said trunnions a cleansing medium, and meansto rotate the drum during the cleansing operation. 7

3.. ln a filter, a rotatable drum having end supporting means includinga hollow trunnion, filtering means Within the drum, means to admitthrough said trunnion a liquid to be'filtered, means to admit throughthe same trunnion and around the liquid admitting means a cleansingmedium for action upon the filtering means in a reverse direction tothat of the filtrate, and means to rotate the drum.

l. In a. filter, the combination of a drum. supporting means for thedrum including); hollow trunnions, filtering means within the drum,means to admit through one of the trunnions a liquid to he filtered,means to admit through both of the trunnions independent cleansingmediums for action in different directions upon the filtering means,

and means to rotate the drum during: the cleansing ol the filteringmeans.

5. ln a filter, the cinnhination of a drum. a pair oi trunnions tosupport the drum for rotation around an axis, at least one oi thetrunnizms tr in;- hollow, filtering: means within the drum, means toadmit within the drum through said hollow trunnion a liquid to hefiltered for passage in one direction throu 'h the filtering meanscausing the accumination on the outsidcs thcrcol' ol' the solid matter,and means to admit a clcunsing medium through said hollow trunnionindependent of said liquid to the drum for dislodging the solid maitcrfrom the outsides of the filtering mcans in a direction reverse to thedirection o:" the filtrate.

(3. in a filter, the c: nhination ol' a drum. a pair of trunnions, meanslor siuiporling the drum for rotation around an axis, fillering meanswithin the drum, means to admit liquid to be filtered through one oilthe trunnions with movement of the liquid in a cerain direction, meansto admit a cl ansing medium into the drmn through the trunnion justmentioned for action upon the filtering means in a direction reverse tothat of the filtrate. and means to rotate the drum substantially as setforth.

7. In a filter, the combination oi" a drum, means to support the drumfor rotation around an axis, inc-ans to rotate the drum, filtering meanswithin the drum for the separation of solid matter from the filtrate,and means to admit into the drum dill'crenl cleansing mediums alongindcpcmlcnt channels coaxially of the drum, one medium passing throughthe filtering means in a direction reverse to that ol? the filtrate.while the other cleansing medium is delivered on the outside o thefiltering means.

LEW'IS \ViCllEll BE HG.

